Block.



PATENTBD 111111-112, 1906.

A. B. TARBOX,

BLOCK.

19211101110111111213 JUNE 24. 1906.

.A y locked,so as to be tipped back and permit of 'I5 jthe removal of the sheave rope or wire.

-i531comprisn the two halves of the blocks, du-

UNrTnn sirenes earner ornron. I ALFRED B. TARBGX, OF BOSTON, MASSACHUSET'LS. l I

shoes.. i

.- No. 823,231. specification of Letters Patent. Patented June 12,1906.

f I Application tiled June 24,1905. Serial No. 265,756. i i

To all whom, it may concern: I forming portions c2, which act to protect the 1. 'Beit known that I, ALFRED B. TARBOX, a peri' hery of the sheave. The side of each `citirer'i of the United States, residing at Boschee is made with an outwardly-rounding ton', inthe county of Suffolk and State of annular wall-forming ortion c3 around or 5 Massachusetts, have invented a new and useinclosing a deeply-sun central side portion 6o Improvement in Blocks, of which the folc4. he annular wall portion as forms on its lowing is a full, clear, and exact description, inside a deep annular cavity, which is espereference being had to. the accompanying cially adapted to catch dirt or sandand preawings, forming a part of this specification, vent it from getting into the bearings of the 1o in explaining its nature.

he invention relates to a block or that ykind of a block or snatch-block in which a ead carrying `the hook is adapted to be -un-` outside t 1e cheeks are the-straps B and 7o These straps make their engagement with the sheave-pin by extending through the annu- .lar wall or cheek portions a3, thence alor; Yside the central sunken cheek portions c4, `here their engagement with the sheave-pui is 75 made, and are then continued to enter the annular portion oi1 the cheek on the opposite side from where the extension of the straps through the same is first made, thus acting as a guard for protecting and concealing the 8o ends of the straps. These straps are similar in form, of the same length, and have on their upper ends loops t. l prefer to form the straps and loops out of thin strap metal folded back 011 itself to form the strap of dou- 8 5 by reference to the drawings, in which` f j ble thickness and the loop formed by the g [The object of my invention is to lill the defor a short block of this kind having a relatively-large sheave and reat strength of construction, c'oinbined wit ease of operaltion,

- attaining this object to make the mam parts,

phcateso one another. .:Besides its strength and simplicity ci construction my improved block embodies also n t e drawin s, Figure l shovs the imturned end, as shown 1n the drawings. These proved block in side elevation. Fig. 2 shows l the'same in front elevation. Fi 3 shows a 3 5A vertical cross-section of the bloc i; Fig.. 4, a horizontal cross-section ofthe same, and Fig. 5 illustrates, mainly in enlarged vertical section, a detail of construction to which reference will hereinafter be made. 4o Referring to the drawings, A A represent the cheeksof the block inclosing a sheave A2, w 'ch turns upon a sheave-pin A3, retained in the usual manner. The cheeks in form are duplicates of one an- 4 5 other. IAt thelower ends eachis provided with an integral inwardly-extending flange-hearing extension a, the han e oof which when thecheeks are combinecl meeting at about themedial line ofthe block and are bolted or 5o riveted together. By means of these inturned extensions thus united the cheeks f are properly spaced from one another, and t e extensions form also the closed bottom of theblock. The outer edge or rim of each of 5' 5 the cheeks has inw rdly-extending beadabove the upper edges of the cheeks, and with them the head C, carrying the hook D, is 9o adapted to combine. The manner of such combination is as follows: l

The head, it is to' be noted, comprises a main portion' c, into which the end kof the hook is socketed so as to turn and be secured on the under side by a head d.` From the o posite sides of the head there depend integral flange-formingsides c c2. These sides are so far separated from one another and of such breadth as to straddle the loop-forming ends roo of the straps, their depth or extension being formed within them, so as to give ample room for the head d or other means for retaining the hook. These two sides of the head are m5 then secured to the looped ends of the straps by means of the bolts or pins c3 c3, which pass oughthe sides and loops.

e special mechanical capability of this mode of retention, besides its strength and 11o des simplicity of construction,'is'that the looped l ends of the straps provide just sueh pivotal support or bearing for the pins passing through them and carrying the head that the head may tip or turn upon these pins toward either eheek for releasing the sheave wire or rope. In order that the pivot-forming pins may easily be taken out -for releasing the head, they may be common bolts seeured at one end by a detachableeotter-pin e, or, as shown in Fig. 5, they may be simply bolts e7, which pass through one side of the head and the looped ends of the straps and are then threaded into the other side of the head, so as to be turned out by a wrench. Of eourse one of these bolts may be made permanent and the other one detaehable, but the means described permits of both pins being made detachable, and this is a great advantage, inasmuch as the sheave rope or wire may be released -from either side of theI bloek.

Projectingl from the flange-forming side portions e e2 of the head, in line with the sheave, are the extensions or parts e5 c,

or rope proper plaee.

It is to be observed also that the head is made heavy, or, in other words, of sufiieient metal to be absolutely rigid and combining, as it does, with the ends of the straps, holds them spaeed apart-in proper plaee, and so gives, as it were, a rigidity and strength to the entire bleek.

Having thus fully deseribed my invention, I, elaim and desire to seeure by Letters Patent of the United States- 1. Abloek of the eharaeter speeified having cheeks, a sheave inelosed thereby, a sheave-pin on which said sheave is adapte to turn, straps making engagen'ient with safid sheave-pin, said straps having loops 'formed in the ends thereof, and a hook-earrying head eombining with the looped ends of said straps, said head having a main portion with which the hook is adapted to make eonneetion, flanges dependent therefrom adapted to straddle said. looped ends of the straps and )ins or bolts for scouring said flanged sides of the head. to said ends of the straps.

42. A bleek of the eharaeter specified having cheeks, a sheave inelosed thereby, a sheave-pin' on whieh said sheave is adapted to turn, straps extending alongside said eheeks to make engagement with said sheave-l'iin, said straps having loops formed in the ends thereof, 'a hook-earrying head having deendent flanges adapted -to straddle said ihoped ends of the straps, and pins or bolts extending through the flange-forming sides of said head and said looped ends of the straps, whereby said head may be made to ing eheeks, a

which aet as guards to hold the sheave wire.

pivot and said ends of the straps be held rigidly in place.

3. A bleek of the character specified havsheave inelosed thereby, a sheave-pin on which said sheave is adapte to turn, straps making engagement with said sheave-pin and extending above the upper edges of said cheeks, a head having fianged sides adapted to combine with said ends of the stra s and make pivotal connection therewit i, whereby said head may be turned, and extensions or pro'eetions on said iianged sides, on the edges t ereof adjacent to the sheave and in line therewith, for holding said sheave rope or wire in'plaee.

4t. A bleek of the character spee`fied having cheeks, a sheave inelosed thereby, a sheave-pin on which said sheave is adapte to turn, eaeh of said eheeks having an outwardly-bulging annular wall forming on the inside an annular eavity and inside said annular wall a deeply-sunken eenter, straps extending through the annular wall of said respective eheeks at one side thereof, thence extending alongside their deeply-sunken eenter to make engagement with the sheave-pin and continued into the annular walls oi the cheeks forming a means of concealment and guard therefor, said straps extending above the upper edges of said cheeks and having loops formed on, the upper ends thereof, a hook-earrying head having flanges dependent therefrom, adapted by its flanges to straddle said looped ends of the straps, and pins or bolts extending through said flange-forming sides of the head and said looped ends of the straps, substantially as described.

5. A bleek oi the character speeiiidd having cheeks, a sheave inelosed thereby, a sheave-pin on which said sheave is adapte to turn, said cheeks having integral, inwardlyextending, ilange-earrydng extensions at the bottom ends thereof, said flanges or extensions being adapted to be riveted together, whereby said eheeks are rigidly united and the extensions form the closed bottom of the bleek, straps making engagement with said sheave-pin and extending above the upper edges oi' the eheeks, said straps having loops formed on the ends thereof, and a hook-earrying head having dependent flanges adapted to straddle said looped ends of the stra s, and pins or bolts extending through said anges, whereby said head may be made to pivot and said ends of the straps may be held rigidly in plaee.

ALFRED B. franox.

Witnesses JonN E. R. HAYES, ROBERT E. BREWER.

'roo

IIO 

